Performance: 1. Complies with PCI2.1 specification and supports 32-bit PCI bus. Plug and play, automatic IRQ and I/O addresses. 2. Supports multiple multi-serial cards. Data bit length: 4, 5, 6, 7, 8 bytes. 3. Parity: None, Odd, Even. Stop bit length: 1, 1.5, 2. 4. Data flow control mode: None, Hardware, Xon/Xoff. 5. Supports WINDOWS 2000/2003/XP. Maximum data transfer rate can reach 1M/S. Installation: 1. Turn off the computer and any connected devices. 2. Open the computer case, insert the card into an unused PCI slot, and secure it. 3. Connect the wires on the PCI to R232 expansion card. 4. Turn on the computer, and the driver will be installed. Important Notes: 1. During the PC self-test, the system will notify you of the device. 2. Each PCI TO R232 expansion card occupies an interrupt, automatically assigned by the system. 3. The port sequence number is determined by the PCI slot position. 4. In a WINDOWS system, if no other similar products are installed, the port name usually starts from COM3, depending on the motherboard's ports. 5. If you need to replace the card with a new one and driver in a WINDOWS system, you must remove the original card from \"multifunction adapter\". 6. Never insert or remove the card and cable connection under any circumstances. Material: PCB Color: Black Package Contents: 1 x RS232 Expansion Card, 1 x CD Driver. Other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.